Pump-valve seat and liner puller



May 19, 1925.

` H. w. s'rEwART PUMP VALVE SEAT AND LINER PULLER Filed Oct. 8, 1923 Patentecl May 19, 1925.

pTEfNr o-Fricizi...

HENRY w.V s'rnWjAnr, or Lonefianiion, oALIroRNrA.

PMP-VALVE SEAT AND LINER PULER.

Application' fiIed October 8, 1923i Serial 'Noi 667,255.

To all iili'omiz't may Gomera-' Be'i't known that; I, HnNiiY VV. S'Tnwiiii'r, a citizenof the United? States, residiiig at Long Beach, iii the county of Los Angeles and Stateof California, liave invented new and usefulA Improvemciitsi in Pump-Valve Seat and Liner Pullers,` of which the .following is a specification.

Tliis iiivention relates to tools and more partieul'arly to a'valve seat puller'.

An object of the present invention-is to provide a' simple, inexpensive, substantial and effectivelyl operablelde'vice for'readily piilling'bushings or sleeves oi' other meL chanical elen'ients froii'i'y their 'ii'iountings An object especially is t'oprovide a device to Fig. 2 is a side elevation and vei'tical sec-` tion showing the operation of the device.

Fig. 3 is a top plan and cross section. The tool of the present invention consists of a body 2 here sliown as cylindrioal and of such' dimensions that it is adapted to be slipped down through a valveseat S in the form of av sleeve fitted in the shell or casing, C. It becomes necessary to remove the valve seat for renewal and for regrinding or for other purposes, and in such event the puller V body 2 vis passeddown through the valve seat so as to position sliding blocks 3 below the lower edge of the valve seat.

These blocks 3 are provided with outwardly extending hook ends 3a which, in their effective position extend to the edge of the seat S. Tlie bloclrs are provided with longitudinally extending beads 8b engaging complenientary guide Channels 4 which incline upwardly and inwardly toward the top of the body 2, with the result that when the blocks 3 move, they have an outward or inward movement concurrently with their endwise movement. Then the puller body 2 is passed down into the valve seat, the lower ends ofthe blocks 3 engage the valve seat and the blocls are forced vinwardly so that their hoolrs 3 will clear and pass down in through the valve seat.

For the purpose of'piilling the blocks and thebody 2, auch with it the valve seat S, the

body is provided. with a. stem or shank 5 which is threaded into the body 2 and passes freely through a volre 7 which, in the inverted position, bears downzon the casingi C at each side of the valve seat S. A hand wheel 8 is 'thrcaded on the upper end' 6 of the stei'ii 5, and' when tlie hand wheel is turned it cause/sa relative upward move'- ment of the piiller so that the hoolrs on the blocks' 3 come up against the lower edge of the valve seat S and this is positively gripped landf pulled i upwardly concu'i'rently with' the up` 1ard iiiovement of the piiller body 2. i A feature of the iiivention is 'that after the parts of the puller have been assembled, the Stein 5 serves as a guard limiting` the up- Ward movement of the hook blocks 3 and these are therefore prevented froin being dislodged a-nd lost. The blocks' of their own weight slip down and outward after they clear the valve seat when the piiller is being inserted. Therefore the blocks autoinatically assiime an expanded position so that the hooli's will engage the lower end of the valve seat as the puller body is forced upward by the turning of the hand wheel 8.

The slots 4; forining the giiideways for the blocls 3 terminate within the lower end of the body 3 so as to provide stop Shoulders 4a against which the lower ends of the hook blocks solidly rest when the puller body is forced upwardly in the extracting operation.

Further einbodimeuts, modifications and' variations' inay be resorted to within the principle of the invention.

That is claimed is:

1. A valve seat and liner puller coinprising a body having a shaiik with a threaded portion, a bridge-forming eleinent slidably mounted on the shank and adapted to bear on a primary supporting part in which the valve seat or liner is inounted, means on the upper end Vof the shank to eng-age the Vsaid bridge-forming eleinent and operative to pull the said, body, and hook devices slidably mounted on the outside'of said body and adapted to automatically inove to an effective position below the end of a valve seat or liner to be pulled.

2. A valve seat and liner puller coinprising a body having a shank with a threaded iportion, a bridge-forming elementslidably mounted on the shank and adapted to bear on a primary supporting part in which the valve seat or liner is mounted, means on the upper end of the shank to engage the said bridge-forming' element and operative to pull the said body, and hook devices slidably mounted on the outside of said body and adapted to automatically move to an effective position below the end of a Valve seat or liner to be pulled; said hook devices including blocks mounted for inward and outward and longitudinal movement in the said body.

A valve seat and liner puller eomprising` a body, means for imparting an upward i'novement to said body, and hook devices slidably mounted in inclined grooves formed upon said body and being adapted to engage beneath a liner or valve seat to be pulled.

4. A valve seat puller comprising a body portion adapted to pass down through the valve seat to be pulled, means for eii'ecting an npward, positive movement of the inserted body portion`l and hook blocks mounted in the said body portion and adapted to VShift outwardly concnrrontly With a longimounted.

5. A valve seat puller comprising a body portion adapted to pass down through the valve seat to be pulled, means for effecting an upward, positive inovement of the inserted body portion, and hook blocks mounted in the said body portion and adapted to shift ontwardly concurrently with a longitndinal movement to an effective position to grapple the lower end of the seat to be pulled, the body being provided with guideways arranged obliqnely as to the axis of the body and in which the blocks are slidably mounted, the said guideways terminating` in Shoulders against which the sliding blocks are irmly supported to take the ie sistance when pnlling a valve seat.

In testiinony whereof I have signed my name to this specification.

I-ENRY 7. STE`VART. 

